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1066 vs 800 MHz Memory Speed

Forum Motherboards & Memory : Memory - 1066 vs 800 MHz Memory Speed

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How much difference does it really make if memory runs at 1066 MHz rather than 800 MHZ?

I'll be getting 3 or 4 GB of RAM.

Probably a 500GB 7200 rpm SATA 3Gb/s hard drive.

OS 64 bit -- Vista Home Premium now, 7 eventually.

Probably either an Intel Pentium Dual-Core processor E5300 [2.6GHz, 2MB L2, 800MHz FSB] or an an Intel Core 2 Quad processor Q8300 [2.5GHz, 4MB L2, 1333MHz FSB].

I am NOT a gamer but will tend to have several windows and apps open at same time, and would like to be able to run video off internet without problems.

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Basically no measurable difference (0 to 1.5%), but less problems when installing DDR2-800 instead of overclocked DDR2-1066.

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Reply to GhislainG

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How much difference does it really make if memory runs at 1066 MHz rather than 800 MHZ?

PC26400 800MHz. = 6.4GBs/sec. data transfer rate RAM to CPU.

PC28500 1066MHz. = 8.5GBs/sec. data transfer rate.

High quality PC26400 will overclock to near PC28500 transfer rates and at 4 CAS in some cases. PC26400 is avalable with voltage requirements as low as 1.8v.

Message edited by badge on 10-04-2009 at 12:17:20 AM

------------------------------ "To better understand why you need a personal computer, let's take a look at the pathetic mess you call your life."
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GhislainG wrote :

Basically no measurable difference (0 to 1.5%), but less problems when installing DDR2-800 instead of overclocked DDR2-1066.

thanks.

so i can use 800 speed memory with either of the processors and there will be no tangible operating restriction as compared to a 1066 speed memory?

but then you also seem to say that using 1066 speed memory with the Core2Quad (1333 fsb) will cause fewer problems.

i'm confused (as usual)

Reply to robby

Quote :

but then you also seem to say that using 1066 speed memory with the Core2Quad (1333 fsb) will cause fewer problems.

Certainly not. I said that DDR2-800 causes less problems, regardless of the CPU FSB. Most people who post here about DDR2 memory issues use 1066 memory, not 800. Do yourself a favour and buy G.Skill PI Black DDR2-800: http://www.newegg.com/Product/Prod [...] 820231209. They run fine at 800 MHz with 4-4-4-12 timings at 1.9V.

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1066 vs 800 MHz Memory Speed

Forum Motherboards & Memory : Memory - 1066 vs 800 MHz Memory Speed